I have just started to read Dr Peatfield's book which is an eye-opener and no doubt I will have more questions but last night I noticed he says "do not take your temperature under your arm with a digital thermometer". Can anyone tell me why please?

Also, I have been on Levo since Aug and am now on 100mcg and without boring you with the reasons, didn't take any on Sunday. This didn't seem to make any difference, and in fact I felt pretty good yesterday except for the fact two of my fingers became extremely painful and I can hardly use them today. Could there be a link? I don't suffer from joint pain as a consequence of being hypo (at least I don't think so-I may think differently when I've finished the book!)

The results indicate that overall the DigiTemp thermometer on average under-recorded temperature significantly (p<0.05), both at oral and axilla sites, compared to a mercury-in-glass reading at the axilla. These mean differences could be considered clinically, as well as statistically, significant. For instance, a DigiTemp thermometer consistently under-recorded temperatures by 0.34°C, giving a measurement of 37°C, when the subject's 'real' temperature was 37.34°C. On the basis of the reading, the patient's temperature would appear normal, when in fact he or she had a pyrexia that would require nursing intervention (Heath, 1995). The disposable thermometers used to take oral temperature readings on average significantly under-recorded temperature compared to the mercury-in-glass reading.